DIFF Subgroup
E21D 15/60 Devices for withdrawing props or chocks
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Props; Chocks > Devices for withdrawing props or chocks
CPC:
Props (in the building art E04G25/00); Chocks > Devices for withdrawing props or chocks
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
Navigate with arrow keys, Enter to open